"Huge lack of tanks and healers in the game"

[Fendred]

Having played both tank and healer for extended periods at end game, here is why there is a tank shortage: Running dungeons gets boring. It's oddly refreshing to do world bosses and look for hunts, since those actually capitalize on the community aspect of the game. Something that cannot be satisfied by cross-server dungeon groups.

One of the reasons anyone plays a tank or healer is to be useful to a team of players. There is very little long term benefit to the gratitude gained from a duty finder group.